1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f947526d7fcfe36bdb746079d2bcbf629466d9f6a4ee229167f838aae73bd9b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cf8a7e0-ab29-4bb2-bd7e-aeb9548a41a5.json and https://artists.proofprofile.net/proofs/artist/9cf8a7e0-ab29-4bb2-bd7e-aeb9548a41a5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd03d9b7ba57b68d099845ba7416cf671dd538de2b13feece9e9e6735df5ff1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA71813651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6429b36c70802f86d27c67a902e0bf2f08ce934eb67aa6ae68b08f222dc7e085. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES92090254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d6fcdb3c6031f957294df0342ba61df6b265ace9f0eff3a200d7658c77905c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWY2168127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c705dff471b94935a1a45f3cc3e78c06f31261f6b1f214621f497c5c91c0471. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES92279655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b6d2e32578c3b20e1c79e8518d5a586f07c516b3927f789727171ab2cfc658. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEN2243229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf307d79e3a4ab37d3cbbda3977038928f7316cd54cc57928932ad6ba77523dfe. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAZ2286673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e24862bbe5a4986fb7439bcce1901129fa0bf3151dea528b3808027830e8da. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAZ2286678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9e2270d0ef9dd5aec490188eb6042f33541d5e69223f4eb8b4aac316704d3a. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2447499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ed115810b72ea1219a773e76c4309b36f361f25c1f60aaa88fb6c5231c09b3. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7M2456034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a5b94c63ce1bd94cdd6c185268f969c0a51d424b8dec927c13ae76b2410261. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAS2527639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d30868333bfc22d786380ae358325f5c698de4078dadd7873152fa4dfc2e37. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAS2525616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4667699f3f83a5d1b41276871f4b27c554b9e1ce37a3af1927c7f0338828fcad. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB92200361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7586c03227ba70ec8234bbce29c52abd4ee489282466ab36e1d6011af9f905cd. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ72466565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa44b3dce166bfd150d357d7332bedfed826d3df4e15f24e0d2c3388d70074c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNC2471608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd862da8b55cd47f40fa86662390e3aac308b7567a3302e9ee886493ba76e00f. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNC2471609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d38c46c33f09375d3a81e0522a88c22a2a5d993706846982c5739c6c861f51. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ42478166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb601d937bbcaf0c0caaf298e215c1614d8ee0020096afb3a4b61d93fa0ea5872. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ42478167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf987ffca08b0c271990391adb30ffc3548393494cd35f92c3e75b8d37375f8. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ42478171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f9cd5e83fe7cfa8593c2876868cea3423d6ab0899ab46bc88d264b54d48eac. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ42478173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5397bb200214084eaf84cbe6c23ca427e30457a04274e2fb87094b10808838. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ42478178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b3f65a7d93c0a8457c5fad2c1a3e26cb906a04413d54c3c09ea711d4d2dabb. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN72350941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cde5311063032d1e76370c7e341cd265403bbd69248a41941ee7b5582fc5101. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN72350942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43acc3127c210f8f0b134d39f16e31074d2724c60c4808b56327e5a421e7d062. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN72350945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d78ddc4f47306b41c5966df1d72e99117d031577848db35853d4dec79af2f3. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN72350946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284e8029d45a4366b3918b6a345a082f9a30c9aa59d240abc2d65d3092347a04. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN72353026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa207bcadd603fecb885f08c304d7a919473f9d8e7dfe844df65e0ce5cf5978d0. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN72353029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d2941cc89b671257c4938b289ace504b651f2e3d76f900b89e778dcfd39b03. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN72319769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335dc14b20d447c8a78b433d8f5ee427dacf5978beeeae286a18ea5d66636e74. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6J2412528.